using System;
using System.Linq;
using System.Reflection;
using System.Threading;

using System.Threading.Tasks;
using Newtonsoft.Json.Linq;
using System.Collections.Generic;
using UnityEngine;

/// <summary>
/// 游戏配置数据
/// </summary>
sealed public partial class GameConfigData
{
    #region '   单例   '
    private static GameConfigData _ins = null;
    public static GameConfigData Ins
    {
        get
        {
            if (null == _ins)
            {
                LogHelper.LogError("配置数据尚未初始化！");
            }
            return _ins;
        }
    }
    /// <summary>
    /// 私有构造函数
    /// </summary>
    /// <param name="arg"></param>
    private GameConfigData(JObject arg = null)
    {
        System.Diagnostics.Trace.Assert(null != arg, "初始化数据不可为空!");
        data = arg;
    }
    private static JObject data;
    #endregion
    /// <summary>
    /// 配置数据是否已加载
    /// </summary>
    public static bool IsReady => _ins != null;

    /// <summary>
    /// 初始化方法, 无法在外部通过构造函数创建实例, 只能通过init方法初始化单例.
    /// </summary>
    /// <param name="arg"></param>
    public static void Init(JObject arg = null)
    {
        _ins = new GameConfigData(arg);
        if (null != _ins)
        {
            Thread t = new Thread(() =>
            {
                var st = DateTimeOffset.Now;
                LogHelper.Log(" 后台线程触发deserialize 开始");
                //_ins.touchEveryProperty();                       // 没用!不挣扎了...还是用反射吧,反射性能更好.--gwang
                var tp = typeof(GameConfigData);
                var pps = tp.GetProperties();
                Parallel.ForEach<PropertyInfo>(pps, p =>           // 并行实例化(反序列化到强类型)各个模块的数据
                {
                    if (p.GetCustomAttribute<sm_modPropAttribute>() != null)
                    {
                        _ = p.GetValue(_ins);
                    }
                });
                LogHelper.Log($" 后台线程触发deserialize 结束. 耗时: {(DateTimeOffset.Now - st).TotalMilliseconds:.00}ms");
            });
            t.IsBackground = true;
            t.Start();
        }
    }


    /// <summary>
    /// 指示这是一个模块属性
    /// </summary>
    [AttributeUsage(AttributeTargets.Property)]
    partial class sm_modPropAttribute : Attribute
    {
    }
    #region  '   辅助方法   '
    private static T _moGetById<K, T>(K id, Dictionary<K, T> dic, string desc = "对象") where T : class
    {
        if (!dic.TryGetValue(id, out T ret))
        {
            LogHelper.LogWarning(string.Format("未找到{0}配置【{1}】", desc, id.ToString()));
            return null;
        }
        return ret;
    }
    #endregion

}